Provided are a device and a method for assisting in taking a beverage that allow a user to receive assistance in taking a beverage with a relatively natural action. In the beverage intake assistance device 10, a sealed space 70 is formed inside the container body 20 when the first upstream valve 60 or the second upstream valve 34 upstream of the container body 20 and the downstream valve 50 downstream of the container body 20 are in a closed state. In a state where the sealed space 70 is formed, air is supplied into the sealed space 70 by the manual air pump 30 to increase pressure in the sealed space 70. In a state where the pressure has increased, the user opens the downstream valve 50 by the pressing force of his/her own mouth, and the beverage 100 advances through the straw 24 by the pressure in the...

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